The detail history on various satellite and probe types up to 1980 is superb. The pullout pages for the rocket boosters and early space stations were of top quality. Gatland also kept a "Space Diary" of key events in an appendix and key dimensional information on rocket boosters in the end papers. He updated his book in 1990. While it is of quality, it lacks the pullout pages of the 1981 version.
It is probably the best reference on the topic of space exploration published in the 20th century. It will be a herculean task to match and update it in the 21st century. John Gatland, who died in 2006, penned a superb reference book.
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